Filing-gage



G. S. SWYGERT.

FILING GAGE.

APPLICATION FILED FEB. H. 1919.

1,353,089. PatentedSept.14,1920.'

UTTED STATE' FILING-GAGE.

Specification of Letters Patent. Pate ted 1315. 14, 1920.

Application filed February 17, 1919. serial No. 277,549.

To all whom it may concern:

Be it known that I, GEORGE S. SWYGERT, a citizen of the United States, residing at C0- lumbia, in the county of Richland and State of South Carolina, have invented new and useful Improvements in Filing-Gages, of which the following is a specification.

This invention relates to tools designed for use in fitting the valves of internal combustion engines, and more particularly valves of that type which are opened by a push rod operating against the stem of the valve. 1V hen new valves are installed, or old ones are ground, it is important to again obtain a correct clearance between the valve stems and the push rods in order that there may be no loss of power or irregularity of engine action, and hence the present invention has been designed to provide a holder and a gage for the valve to enable the end of the stem to be filed to reduce its length to obtain the proper clearance between the end of the valve stem and the push rod.

The object stated is attained by means of a novel combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawing forming a part of this specification.

In the drawing,

Figure 1 is a perspective view of the 'tool,; and

Fig. 2 is a central longitudinal section thereof showing the manner in which it is.

used. 7

Referring specifically to the drawing, 5 denotes a handle or shank of suitable length and external contour so that it may be conveniently grasped with one hand and firmly held. To the outer end of the shank is rigidly secured a gage block 6 of metal. The

shank has a central longitudinal bore 7 which is continued through the gage block. The bore therefore extends throughout the entire length of the tool and opens through the respective ends thereof. The outer face of the gage block through which the bore opens at one end is case-hardened, and per- 7 its end projects from the'face of the block 6 a distance corresponding-to the amount of metal to be trimmed off. The stem 1s locked in this position by the set screw, 8. The projecting end will, preferably, be filed ofl", al though other convenient operation may be resorted to. The block 6 acts as-a gage, the file 11 being operated until the projectin end of the valve stem has been filed ofi squarely and the stem end is flush with the face of the block. The bore opens through the rear end of the shank so that the valve stem may be inserted from this end, leaving the valve head on the outside. .The device can be used in a'vise, or it may be held by hand, and as i0 is simple in construction it can be easily and cheaply produced,

I claim 5 V A filing a shank, a the shank, aid shank having a longitudinal bore opening through opposite ends of the shank and continued through the block to the outer end thereof to receive the valve stem, said end being fiat and perpendicular gage for valve stems, comprising to the bore, and means for locking the valve stem in the bore. Y

gage block carried by one end of Tn testimony whereof I afiix mysignature. I

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